Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2007-06-11
2009-12-01
Lau, Tung S (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
Reexamination Certificate
active
07627443
ABSTRACT:
Disclosed is a calibration apparatus and method for programmable response frequency selecting elements. The calibration apparatus comprises a basic reference source, a programmable counter, a control logic unit, and a frequency to time constant converter. The programmable counter generates plural different frequency signals required by the frequency selecting elements with different frequency responses. The frequency to time constant converter determines a calibrated capacitance through the timing control signals generated by the control logic unit. This invention makes the process, temperature, and power supply variation for frequency selecting elements free. It allows the frequency selecting elements to have a high accurate, stable, and wide range programming of frequency responses. It is suitable for multi-standard applications. It greatly reduces the chip size, and significantly lowers down the cost for the applications.
REFERENCES:
patent: 6574288 (2003-06-01), Welland et al.
patent: 2005/0189951 (2005-09-01), Ibrahim et al.
patent: 2005/0242871 (2005-11-01), Wang
patent: 2006/0049899 (2006-03-01), De Ruijter
patent: 2008/0191795 (2008-08-01), Dharmalinggam et al.
Industrial Technology Research Institute
Lau Tung S
Sun Xiuquin
LandOfFree
Calibration apparatus and method for programmable response... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Calibration apparatus and method for programmable response..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calibration apparatus and method for programmable response... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4067253